Autor(es):
Malta, Gabriela ; Pina, João ; Lima, J. Carlos ; Parola, A. Jorge ; Branco, Paula S.
Data: 2024
Identificador Persistente: http://hdl.handle.net/10362/167745
Origem: Repositório Institucional da UNL
Projeto/bolsa:
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0008%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT;
info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FQUI-QOR%2F7450%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00313%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00313%2F2020/PT;
info:eu-repo/grantAgreement/FCT/Projectos de IC&DT de Consolidação de Competências e Recursos em Investigação - 2012/RECI%2FBBB-BQB%2F0230%2F2012/PT;
Assunto(s): Chemistry(all); Chemical Engineering(all); SDG 7 - Affordable and Clean Energy
Descrição
Publisher Copyright: © 2024 The Authors. Published by American Chemical Society. J. Pina acknowledges FCT for the funding through the program CEEC-INST/00152/2018/CP1570/CT0012 (DOI 10.54499/CEECINST/00152/2018/CP1570/CT0012). FCT/MCTES is also acknowledged for the National NMR Facility (RECI/BBB-BEP/ 0124/2012) and PhD grant PD/BD/145324/2019/ (G.M.). The authors would like to thank Hugo Cruz for his help with the cyclic voltammetry measurements and Tiago Mateus for his assistance with IPCE measurements.
A set of acenaphthylene dyes with arylethynyl π-bridges was tested for dye-sensitized solar cells (DSSCs). Crucial steps for the extension of the conjugated system from the acenaphylene core involved Sonogashira coupling reactions. Phenyl, thiophene, benzotriazole, and thieno-[3,2-b]thiophene moieties were employed to extend the conjugation of the π-bridges. The systems were characterized by cyclic voltammetry and by UV-vis absorption and emission. The spectroscopic characterization showed that the last three bridges resulted in red-shifted absorption and emission spectra relative to the parent phenyl-bridged compound, in accordance with TD-DFT calculations. The phenylethynyl derivative 6a achieved a conversion efficiency of 2.51% with Voc, Jsc, and FF values of 0.365 V, 13.32 mA/cm2, and 0.52, respectively. The efficiency of this compound improved to 3.15% with the addition of CDCA (10 mM), representing the best efficiency result in this study.
